Remove obsolete timeline-network-resource-details test

Replaced by a unit test in devtools-frontend: crrev.com/c/4553665

Bug: 1444416
Change-Id: I5517a02c39ef5f6668ec162bccb52bb6f000f288
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4556664


Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1147893}